我是rails的初学者，所以我对嵌套属性感到困惑。
以下是我正在寻找的内容概述：
租车可以制造汽车。（完成）
客户可以预订车辆。
客户是由租车同时预订创建的。
我正在尝试制作一份包含客户和预订信息的预订表格，因为它将是租车人员填写所有信息。
这就是为什么我需要使用嵌套属性，但直到现在我遇到了一些困难。 我有四个模型：
class Car < ActiveRecord::Base
belongs_to :rentalcar
has_many :photos
has_many :reservations
end
。
class Client < ActiveRecord::Base
has_many :reservations
end
。
class Reservation < ActiveRecord::Base
belongs_to :client
belongs_to :car
end
class rentalcar < ActiveRecord::Base
has_many :cars
has_many :reservations
end
表格：
<%= form_for([@car, @car.reservations.new]) do |f| %>
<div class="row">
<div class="col-md-12 price_tag">
<span><%= @car.price %>Dhs</span>
<span class="pull-right">Par jour</span>
</div>
</div>
<div class="row">
<div class="col-md-6">
<label>Nom</label>
<%= f.text_field :nom, placeholder: 'Nom', class: 'form-control' %>
</div>
<div class="col-md-6">
<label>Prenom</label>
<%= f.text_field :prenom, placeholder: 'Prenom', class: 'form-control', disabled: 'true' %>
</div>
</div>
<div class="row">
<div class="col-md-6">
<label>CIN</label>
<%= f.text_field :cin, placeholder: 'CIN', class: 'form-control' %>
</div>
<div class="col-md-6">
<label>Age</label>
<%= f.text_field :age, placeholder: 'Age', class: 'form-control', disabled: 'true' %>
</div>
</div>
<div class="row">
<div class="col-md-6">
<label>Ville</label>
<%= f.text_field :ville, placeholder: 'Ville', class: 'form-control' %>
</div>
<div class="col-md-6">
<label>Télephone</label>
<%= f.text_field :telephone, placeholder: 'Telephone', class: 'form-control', disabled: 'true' %>
</div>
</div>
<div class="row">
<div class="col-md-6">
<label>Email</label>
<%= f.text_field :email, placeholder: 'Email', class: 'form-control' %>
</div>
</div>
<%= f.fields_for :reservations do |reservation_form| %>
<div class="row">
<div class="col-md-6">
<label>Check In</label>
<%= reservation_form.text_field :start_date, readonly: 'true', placeholder: 'Start Date', class: 'form-control' %>
</div>
<div class="col-md-6">
<label>Check Out</label>
<%= reservation_form.text_field :end_date, readonly: 'true', placeholder: 'End Date', class: 'form-control', disabled: 'true' %>
</div>
</div>
<%= reservation_form.hidden_field :car_id, value: @car.id %>
<%= reservation_form.hidden_field :price, value: @car.prix %>
<%= reservation_form.hidden_field :total, id: 'reservation_total' %>
<% end %>
<h4><span id="message"></span></h4>
<div id="preview" style="display: none">
<table class="reservation-table" >
<tbody>
<tr>
<td>Day(s)</td>
<td><span id="reservation_days"></span></td>
</tr>
<tr>
<td>Total</td>
<td><span id="reservation_sum"></span>Dhs</td>
</tr>
</tbody>
</table>
<br>
</div>
<br>
<%= f.submit "Book Now", id:"btn_book", class: "btn btn-primary wide", disabled: 'true' %>
所以我的想法是在做了类似的事情之后得到这个形式：cars / 1 / reservate。 我们将在控制器中有这样的东西：
def reservate
@car = Car.find(params[:id])
@client = Client.new
@client.reservations.build
end
但我不知道它应该保留在哪个控制器中
Edit1：
索引：
add_index "reservations", ["client_id"], name: "index_reservations_on_client_id", using: :btree
add_index "reservations", ["car_id"], name: "index_reservations_on_car_id", using: :btree
add_index "voitures", ["rentelcar_id"], name: "index_voitures_on_rentelcar_id", using: :btree
add_foreign_key "reservations", "clients"
add_foreign_key "reservations", "cars"
add_foreign_key "cars", "rentelcars"
答案 0 :(得分：1)
我相信你们的关系有点混乱，这就是我创造新关系的方式。
class AddRelevantModels < ActiveRecord::Migration
def change
create_table :car_rentals do |t|
t.string :name
t.timestamps null: false
end
create_table :cars do |t|
t.string :model
t.string :car_number
t.belongs_to :car_rental, index: true, foreign_key: true
t.timestamps null: false
end
create_table :clients do |t|
t.string :full_name
t.integer :age
t.string :email
t.string :phone_number
t.timestamps null: false
end
create_table :reservations do |t|
t.belongs_to :car, index: true, foreign_key: true
t.belongs_to :client, index: true, foreign_key: true
t.datetime :start_date
t.datetime :end_date
t.timestamps null: false
end
end
end
car_rental.rb
class CarRental < ActiveRecord::Base
has_many :cars
end
car.rb
class Car < ActiveRecord::Base
has_many :reservations
has_many :clients, through: :reservations
end
reservation.rb
class Reservation < ActiveRecord::Base
belongs_to :client
belongs_to :car
accepts_nested_attributes_for :client
accepts_nested_attributes_for :car
end
client.rb
class Client < ActiveRecord::Base
has_many :reservations
has_many :cars, through: :reservations
end
reservations_controller.rb
class ReservationsController < ApplicationController
def new
@reservation = Reservation.new
@reservation.build_client
end
def create
@reversation = Reservation.new(reservation_params)
if @reversation.save
render :show, id: @reservation
else
render :new
end
end
private
def reservation_params
params.require(:reservation)
.permit(
:start_date, :end_date, client_attributes: [:full_name, :age, :email, :phone_number]
)
end
end
reservations/new.html.erb
<h1>Reservations</h1>
<%= form_for(@reservation) do |f| %>
<%= f.label :start_date %>
<%= f.text_field :start_date %>
<br>
<%= f.label :end_date %>
<%= f.text_field :end_date %>
<br>
<%= f.fields_for :client do |client_field| %>
<%= client_field.label :full_name %>
<%= client_field.text_field :full_name %>
<br>
<%= client_field.label :age %>
<%= client_field.text_field :age %>
<br>
<%= client_field.label :email %>
<%= client_field.text_field :email %>
<br>
<%= client_field.label :phone_number %>
<%= client_field.text_field :phone_number %>
<% end %>
<br>
<%= f.submit %>
<% end %>
现在，如果您提交表单，您可以在数据库中看到客户端也已保存用于预订。
Reservation.first.client
Reservation Load (0.5ms) SELECT "reservations".* FROM "reservations" ORDER BY "reservations"."id" ASC LIMIT 1
Client Load (0.4ms) SELECT "clients".* FROM "clients" WHERE "clients"."id" = $1 LIMIT 1 [["id", 1]]
=> #<Client id: 1, full_name: "remis", age: 22, email: "remis@gmail.com", phone_number: "1231331", created_at: "2016-06-13 06:28:37", updated_at: "2016-06-13 06:28:37">